Hydraulic rotary pumps



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2 Sheets-Sheet 2 J. L. BETZEN HYDRAULIC ROTARY PUMPS INVENTOR. JUE/VL. 5572EA] o l #Il/1 HIS HEENT Nov. 3, 1959 Filed July 16, 1957 United States Patent vC) HYDRAULIC ROTARY PUMPS John L. Betzen, Hereford, Tex.

Application July 16, 1957, Serial No. 672,256

1 Claim. (Cl. 10S-118) This invention relates to improvements in hydraulic pumps and more particularly to hydraulically ydriven rotary 1pumps for use in wells, such as water Wells, oil wells, andthe like. p

The present pump is so constructed as to give a wide variety of uses, especially for handling large volumes of liquid under both low and high pressures.

An object of this invention is to provide a pump which may be placed in the bottom of a well or the like, and which may be driven by a rotary hydraulic motor which is connected integral therewith, thereby eliminating the necessity for reciprocating rods and the like, or for rotating shafts driven by a power unit at the surface.

Another object of the invention is to provide a pump that is simple in construction, low in cost of manufacture,

which is comparatively free of maintenance and repair,

and which is efcient in operation. l

A still `further object of the invention is to provide a pair of hydraulic iluid impeller elements which have a minimum of toothed projections thereon so as to minimize heat, friction and agitation during the movement of the uid thereby.

With these objects in mind, and others which will become manifest as the description proceeds, reference is to be had to the accompanying drawings, in which like reference characters designate like parts in the several views thereof, in which:

Fig. l is a longitudinal sectional view through a well, with parts broken away and shortened, and showing the pump and pump motor installed therein, and showing a power unit and a pressure supply pump connected thereto;

Fig. 2 is an enlarged, fragmentary, perspective View of the lower portion of a well casing showing the pump and pump motor installed therein;

. Fig. 3 is a longitudinal, sectional view through 4the pump and the hydraulically actuated motor, taken on the line 3 3 of Fig. 2, looking in the direction indicated by the arrows;

Fig. 4 is a sectional view taken on the line 4 4 of Fig. 3, looking in the direction indicated by the arrows;

Fig. 5 is a sectional View taken on the line 5 5 of Fig. 3, looking in the direction indicated by the arrows;

Fig. 6 is a sectional view taken on the line 6 6 of Fig. 3, looking in the direction indicated by the arrows;

Fig. 7 is a sectional View taken on the line 7 7 of Fig. l, looking in the direction indicated by the arrows; and

Fig. 8 is a sectional view taken on the line 8 8 of Fig. l, looking in the direction indicated by the arrows.

With more detailed reference to the drawing, the numeral 1 designates a well casing, such as used in well W, which casing has a flow pipe 1a therein, which flow pipe is shown to have a head 2 on which a cap member 4 is secured. The cap member 4 has holes therethrough, through which pipes 6 and 8 pass. The respective stutng boxes 10 and 12 form tight seals between the cap member 4 and the respective pipes 6 and 8. An outlet pipe 14 is connected to the flow pipe 1a for directing the liquid 2,910,948 Patented Nov. 3, 1959 ice being pumped outward to a place of storage or to a place of use, as the case may be.

`A power unit 16 is provided, which power unit may bean electric motor or an internal combustion engine or the like, and on which`is fitted a hydraulic pump designated generally at 18, for generating hydraulic pressure. The power unit 16 is mounted on a base 20.

A hydraulic reservoir 22 surrounds the hydraulic pump, which is designated generally at 18, and keeps the inlet 7 of the pump submerged in hydraulic fluid at all times. The hydraulic pump has a casing, which casing is split longitudinally to enable the ready assembly and disassembly, which casing is secured within reservoir 22 by means of cap screws 23b.

The reservoir 22 completely surrounds the pump 18, which reservoir 22 is provided with a till cap 22a to supply the necessary hydraulic fluid therefor.

The hydraulic pressure pump 18 directs the fluid downward through pipe 8 into hydraulically actuated motor 24. The hydraulically actuated motor 24 is of the rotary t type and has a split casing 26, the portions of which split casing are bolted together by means of bolts 23, as will best be seen in Fig. 3. lIt is preferable to mount the shafts 25 and 27 on anti-friction bearings 28, which bearings are preferably sealed against the entrance of fluid or of foreign matter. The casing 26 is recessed to receive bearings 28, gears 29 and 30, seals 46, and impeller rollers 31 and 42. The bearings 33 and 34, as well as the seals 48 and 52, which form the seal between the respective shafts, are fitted in sleeves 39 and 41 which surround the respective shafts 25 and 27, and which sleeves are positioned in and between housings 26 and 38.

The pump impellers 35 and 36 are mounted on the respective shafts 2S and 27 and rotate therewith. The pump impeller elements 35 and 36 are fitted within a housi-ng 38, which housing is similar in construction to y plementary, semi-annular ribs formed in the bores in the upper end of housing 38. The lower end of housing 26 also has similar complementary, semi-annular ribs in the lower ends of the bores thereof, to complementarily engage the grooves in the upper ends of the respective sleeves 39 and 41, so when the complementary split housings 26 and 38 are bolted together, they will engage the sleeves 39 and 41 therebetween to hold the two housings in longitudinally aligned relation. Bolts 23a secure the flanges of the pump housing 38 to the sleeve 54. Bolts 23a also secure the llanges of the peripheral portion of plates 58 and 59 at the lower and upper portions of housing 38, respectively, which plates 58` and 59, together with the impellers 35 and 36 close the sleeve 54 against return flow of uid which passes upward through pump 40.

The motor for actuating the pump impellers comprises two cylindrical bodies 31 and 32. The cylindrical impeller body 31 of which carries a pair of teeth mounted longitudinally thereof at a spacing of degrees, while the cylindrical impeller body 32 has complementary recesses formed therein, which recesses complementarily engage the teeth of the impeller body 31, with the periph* eries of the respective bodies forming a rolling contact one with the other, while the motor is being actuated. The motor impellers 31 and 32 have their adjacent peripheries in fluid tight contact relation and the peripheries of the bodies are in fluid tight contact with the housing 26, so as to prevent leakage of hydraulic Huid thereby, as the hydraulic uid passes through the motor. The cylindrical impeller bodies 31 and 32 are secured to the respective 3 shafts 2S and 27 by means of keys, as will best be seen in Fig. 5.

The pump impellers 35 and 36, which are mounted on and keyed to the respective shafts 25 and 27, are main,

pellers 35 and 36 are positioned. G-ring sealing units 46,k

d8 and 52 are provided on the shafts 25 and 27, to prevent the ingress of hydraulic fluid, lubricant, or of fluid being pumped from one chamber to another.

While O-ring sealing elements have been shown and described as the sealing means, it is to be understood that other types of sealing means, which are applicable, may be substituted therefor, and while antifriction bearings have been specified, other types of bushings or bearings may be utilized when applicable.

it is to be pointed out that, while straight conduit, such as rigid pipe, is shown as connecting the pump 18 and the hydraulically actuated motor 24, a flexible conduit or even a hose may be used to interconnect the pump 18 and the hydraulically actuated motor 24, which will enable the pump to be run into a well, or placed in other places where it would be impossible for a straight pipe to be used, with the pump delivering the full efficiency. Pumps that are placed at or near the bottom of a well which utilize yrotating shafts from a sou-rce of power at or near the top of the well, require that the bore of the well be sutiiciently straight to enable the shafts to be journaled in axially aligned bearings, otherwise damaging wear will occur on the misaligned parts. Furthermore, wells which utilize reciprocating rods should also have a straight bore hole, or the rods will drag on the sides of the tubing, thereby causing material wear and damage -to both the tubing and the rods. The bore hole of a deep well cannot, as a rule, be kept sufficiently straight for non-flexible pipe to be used between the pump and the power, without causing a drag on the rods or misalignment of rotating shafts. in the present pump the above mentioned diculties are not present. p

The pump 18 has shafts 19 and 21 therein, with the shaft 21 being connected with the power unit 16, the shaft 19y being in driven relation. While the gears 19a and 21a are shown to be in one to one ratio, it is to be understood that other ratios may be used if desired, by altering the pump impellers 1917 and 2lb so as to cause the respective teeth and recesses of the respective impellers to engage in timed relation. The same is true of the motor 24- and pump 40.

` Operation With the power unit 16 running, so as to operate the hydraulic pressure pump 18, hydraulic fluid is withdrawn from reservoir 22 into inlet '7 of the pump 18, and is directed outward through pipe 8, and thence through stufling box 12, downward through pipe 8 in well casing 1. The pipe 8 is connected to a pressure actuated motor 24 to drive tie motor impellers 31 and 32 in the direction indicated by the arrows in Fig. 5, and since the gears 29 and 30, as well as the pump impellers 35 and 36 are secured to the respective shafts, the cylindrical motor impeller bodies 31 and 32 drive pump impellers 35 and 36 of the pump 40, which pump 40 is submerged in the liquid being pumped. The housing 38 and the pump 40 are bolted to the casing sleeve 54, with a portion of the bottom of the sleeve being open, as indicated at 56, Fig. 6, and with a portion of the bottom being closed as indicated at 58, Fig. 6, therefore, the liquid being pumped will be drawn in through the open portion 56 and will be directed from the chamber therein around the periphery of pump impellers 35 and 36 into chamber portion 57 ofthe sleeve 54. Since the chamber 56 is in open communication with the lower portion of ow pipe la, the water, oil, or the like which is being pumped, will be directedinto chamber 57 and thence upward around gear motor 24 into flow pipe 1a and out through outlet pipe 14. The liquid that is pumped upward around and by motor 24 will maintain the motor in cooled condition while it is operating.

While the invention has been illustrated and described for use in a weil, it is to be pointed out that it may also be used for rotary machinery or for vehicles, or any use to which it may be applicable.

It is also to be understood that, while the invention has been described and illustrated in one embodiment thereof, that changes may be made in the minor details of construction and adaptations made to different installations, without departing from the spirit ofthe invention or the scope of the appended claim.

Having thus clearly shown and described the invention, what is claimed as new and desired Vto be secured by' Letters Patent is:

A hydraulically actuated rotary motor adapted to be positioned within a well, a rotary well pumping unit adapted to be positioned Within said well and being 'integrally connected in timed relation with said hydraulically actuated motor; comprising a hydraulically actuated motor having a pair of parallel shafts extending therethrough, a timing gear on each of said shafts, which gears are in meshed relation, complementary, hydraulicallyy actuated motor impellers, one mounted on each of said shafts and being secured thereto for rotation therewith, complementary, rotary well pumping unit impellers, one of which impellers is mounted on and secured to each of said shafts for rotation therewith, a housing surrounding said hydraulically actuated motor impellers in uid tight relation, an inlet opening formed in one side of said housing and an outlet opening formed in the opposite side thereof; a housing surrounding said impellers oli` said rotary well pumping unit in lluid tight relation, said last '.I'nentioned housing having an inlet opening formed in a side thereof and an outlet opening formed in the opposite side thereof, bearings journaling shafts in said housings for rotation about the axis thereof, said housings being divided along a longitudinal medial plane passing through the axes of said shafts, which housing portions are complementary, bolts passing through adjacent portions of said housing portions to secure said housing portions together in unitary, rigid relation, said complementary housing portions, when fitted together, forming pairs of parallel cylindrical bores, annular ribs formed in each of said housings to extend into the respective bores, said housings being adapted to be tted together in end to end, auxiliary aligned relation, the cylindrical bores of the respective housings adapted to be in axial alignment, a pair of sleeves, each of which sleeves has a pair ofl annular grooves formed within the exterior thereof so as to complementally receive said respective annular ribs, at least one of said bearings being positioned in each of said sleeves, and sealing means intermediate the respective shafts and the respective sleeves, when said respective sleeves are fitted within said respective bores.

References Citedin the tile of this patent UNITED STATES PATENTS 744.352 Johnston Nov.; 17, 1903 1,254,358 Rinehart Ian. 22, 191,8 2,100,560 Kennedy Nov. 30, 1937 2,180,378 Whitfield Nov,l 21, 1939 2,269,189 Downs Jan. 6, 1942 

